fractions in math duh

adding fractions

100

4/5+5/4=

9/5

200

4/5+5/?=9/5

5/4

300

9/5+6/5=

15/5

400

three-fourths plus one-sixth

 11/12?

500

9/8+7/9=

116/45

subtracting fractions

100

3/8 - 5/8

2/8

200

4/5minus 6/10

8/10

300

9/10-3/10

6/10

400

 7/8 minus 1/3.

13/24

500

if elpis has 400 dollars and ruf takes 5/8 how much money did ruf take from elpis                     

ruf took 250$ from elpis

additionwordproblem

100

bobby ate 3/5 of a cake and luke ate 1/3 of the same cake how much of the pies did they eat in total

14/15

200

hehe took 4/5 pieces of a pie and jimbob took 2/3 of the same pie how many pieces did they take in all

18/15

300

if i have 20 pieces and my friend took6/8 how many pieces are there left

there are 5 pieces left

400

if there 40 pieces of cake and bob only has 6/9 of the cake how many pieces did the cake have

3/9 =1/3

500

if i have 50 pies and my friend took 4/6 how many pieces are there left

there are 16 2/3